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TST: add tests for using .at() with DateTime indexes #48286

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Merged
merged 6 commits into from
Aug 31, 2022
Merged

TST: add tests for using .at() with DateTime indexes #48286

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888fd82
add tests outlined in GH29709
Aug 27, 2022
df8c5d1
fix styling error caught by github actions
Aug 28, 2022
26a658a
made changes based on suggestions from patrick
Aug 28, 2022
9853f0e
fix pep8 mistakes
Aug 28, 2022
e4488b3
remove usage of to_datetime()
Aug 29, 2022
084597b
fix error in pre-commit checks also move my new test to the bottom of…
Aug 31, 2022
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14 changes: 14 additions & 0 deletions pandas/tests/indexing/test_at.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
CategoricalDtype,
CategoricalIndex,
DataFrame,
DatetimeIndex,
MultiIndex,
Series,
Timestamp,
Expand Down Expand Up @@ -109,6 +110,19 @@ def test_at_setitem_multiindex(self):
)
tm.assert_frame_equal(df, expected)

@pytest.mark.parametrize("row", (Timestamp("2019-01-01"), "2019-01-01"))
def test_at_datetime_index(self, row):
df = DataFrame(
data=[[1] * 2], index=DatetimeIndex(data=["2019-01-01", "2019-01-02"])
)
expected = DataFrame(
data=[[0.5, 1], [1.0, 1]],
index=DatetimeIndex(data=["2019-01-01", "2019-01-02"]),
)

df.at[row, 0] = 0.5
tm.assert_frame_equal(df, expected)


class TestAtSetItemWithExpansion:
def test_at_setitem_expansion_series_dt64tz_value(self, tz_naive_fixture):
Expand Down